| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
4.9%
|
| 1 | Very much difficult | 29 |
28.4%
|
| 2 | Moderately difficult | 24 |
23.5%
|
| 3 | Somewhat difficult | 19 |
18.6%
|
| 4 | Not difficult at all | 25 |
24.5%
|
| Sysmiss | 205 |